Another good new book is "Hidden Karate- The True Bunkai for the Shotokan Katas" it was translated into English and is published by Champ in Japan, but it is available through kiai-karate.com. It is very detailed and informative.

I know this was already mentioned on another thread, but I just read it and was inspired by it. Any open minded person, Martial Artist or otherwise will find guidance in this book, which is applicable to their own personal life. Any closeminded person trying to open their mind will be assisted in doing so by this book. In additional to having a good self-help side, there is much entertainment value in Joe Hyams' life experiences, training will various masters.

-A Story of Life, Fate, and Finding the Lost Art of Koka Ninjutsu in Japanby Daniel DiMarzio

Very interesting read about life, work, and training in Koka (Koga) and Iga Ninjutsu in Japan. Doesn't romanticize Japan.......is very direct and upfront about the positive and negative aspects of living and working there. It also describes in detail training in the long-thought to be extinct art of "Koka" Ninjutsu. Almost nothing is known outside of Japan about Koka Ninjutsu except what is written in this book. It details one-on-one private training with a master of Koka Ninjutsu. The training is very old-fashioned and brutal. It's a glimpse into old-school training and how Japan "really" is. http://www.lulu.com/content/2106699